| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] has been [v-ing] [noun prp] | 19 |
|
| 2 | [noun prp] had been [v-ing] [noun prp] | 11 |
|
| 3 | [noun prp] have been [v-ing] [noun prp] | 9 |
|
